With Windows 10, Microsoft has launched an initiative for applications to be “universal” across their different platforms. This means that an application designed for your computer can also work in a Windows Phone, an Xbox, or any other Windows-compatible devices.
To achieve this, Windows developed the Universal Windows Platform (UWP) and improved the Windows Store to serve as the unified storefront for all Windows apps. To access the Windows Store, users can click the icon on the Taskbar. This will open the Windows Store allowing the user to browse for any app he wants.
Windows also allows “cross-buys”, which means that buying the license for an application on one device, also applies to any other compatible device the user has.